exhaust

  1. R

    Header recommendations

    Hello, looking to hear some header, recommendations. 1985 k20 with 350, with summit 195cc aluminum heads, haven’t picked a cam out yet but going for hydraulic roller. I’ve been looking at headman 69230 or 69092. Curious as to what the difference between these headers are besides angle/straight...
  2. B

    ‘83 K5/new engine: how do I break-in engine before taking to shop to have exhaust installed?

    Soon to be installing a new crate SBC 350 into my restored ‘83 K5. I’ve decided to go with exhaust manifolds instead of headers but my question is how can I break in the new engine without having exhaust pipes installed that I’ll have to take the Blazer to to have the pipes installed? Or, should...
  3. B

    ‘83 K5/4” lift/4WD: Still in need of header fitment recommendations for new crate SBC SP350 w/“D” port heads/angled plugs.

    I didn’t receive any responses to my previous post for the same subject so I’m posting again in hopes of finding someone that is running the same or similar configuration that can tell me what aftermarket headers or exh. manifolds that they could recommend for my ‘83 K5/4” lift/4WD/new crate SBC...
  4. BabyBlueChevrolet

    Long tube headers installed, now backfiring on deceleration?

    So I finally got around to installing my long tube headers today. I removed the rest of the exhaust including muffler for now until i can find a place that can weld me on some mufflers. It runs fine (loud as hell) when i step on the gas, but as soon as i let off the throttle, it backfires like...
  5. BabyBlueChevrolet

    Exhaust leak affecting performance?

    So I crawled under my ‘73 today to try and get to the bottom of why its running crappy. I was hearing a ticking or popping sound and so I stuck my hand around the exhaust flange and felt exhaust coming out, then I looked at the lower portion of the exhaust pipe and saw a huge hole in it. My...
  6. C

    four gas analysis

    I recently had a four gas analysis done on my 84 c10. The results stated I had lots of hydrocarbons in my exhaust (unburnt fuel). I have a 4.1L 250 with 40,000 miles. I recently replaced my spark plugs and wires. I have the original distributor. Does anyone know what I could do to reduce these...
  7. J

    Chevy 250 Exhaust Manifold

    I've looked around and can't seem to find any information so hopefully y'all might now. Has anyone seen this exhaust manifold before? I know people make them custom but I don't believe that is the case with this. If someone does know, is it true dual or just dual output? Eventually looking...
  8. ahoppj

    Smokey business

    Hello ladies and gents! I had some trouble starting and idling with my truck. I planned on changing spark plugs and wires as apart of the project schedule and went ahead. Now!!! She starts perfect and runs like a Dream compared to before. BUT!! now I’m getting a concerning amount...
  9. JimmyDale

    Cracked manifold - looking @ headers and exhaust on a budget. Suggestions?

    JimmyDale's got a bad exhaust leak - cracked exhaust manifold on the passenger side - tired of breathing fumes and if I hot rod, he backfires sometimes. 350 motor, he's got some duals right now with some small mufflers, decent deep sound cept for the leak, but I'd like deeper and louder. I...
  10. Chris Evans

    Flowmaster FlowFX Installs

    I haven't seen anyone install the Flowmaster FlowFX on anything older than mid 90 to newer GMs. Has anyone put these on their squarebody? I like the sound and they aren't overly expensive. Just curious.

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